Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X80X25S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X80X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 80mm and 25mm give 4 controllable stop positions across a 105mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 180 mm
- Stroke 225 mm
- Total travel105 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X80X25S
The SCT100X80X25S is a tandem multi-position pneumatic cylinder that provides four fixed rod positions: 0 mm (fully retracted), 80 mm, 25 mm, and 105 mm (total travel). Operating on filtered air, each of its two 100 mm bore piston sections generates a push force of 3927 N at 0.5 MPa, scaling up to 7068 N at the maximum operating pressure of 0.9 MPa. The cylinder features a 25 mm diameter rod, M20x1.5 rod thread, and a body length A of 308 mm, making it a robust tie-rod design for heavy discrete stopping tasks.
This model includes a built-in magnet, designated by the -S suffix, allowing easy attachment of CMSG, DMSG, or EMSG sensors directly to the barrel for non-contact position sensing. The standard configuration uses TPU seals with an operating temperature range of -20 to +70 °C and PT port threads. As a genuine AirTAC component, it is engineered for reliable sequencing in applications where a single cylinder must index between multiple hard stops without the complexity of two separate actuators.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X80X25S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X80X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 80 / 25 mm |
| Total travel | 105 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 29 mm |
| Max stroke / section | Up to 500 mm standard |
Specifications follow the official AirTAC SCT (multi-position) datasheet. SCT is available in bores 32–100; each of the two sections has a 500 mm max standard stroke (800 mm max). Confirm against the product label before installation. Thread options: PT (standard) / G.
Stop Positions (4)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 80 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 105 mm |
Positions are set by pressurising section 1, section 2, or both. With equal strokes you get 3 distinct positions; with unequal strokes you get 4.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Force is per actuated piston section (single-piston, same as the SC bore): push uses the full bore area, pull subtracts the rod area. Size with a safety margin.
Model Code: Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X80X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×80 | Stroke 1 (section 1) in mm. |
| ×25 | Stroke 2 (section 2) in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCD (double rod), SCJ (adjustable stroke). SCT mounting: Basic, FA, FB, CA, CB, LB. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X80X25S Is Used
Two-Stage Diverter Gate
Uses the four discrete positions to route packages to three different conveyor lanes. The rod extends to 25 mm for lane one, 80 mm for lane two, and the full 105 mm for lane three, all from a single actuator.
Multi-Depth Pressing
Controls a press platen to two different working depths in sequence. The cylinder stops at the 25 mm position for a light pre-press and advances to the 80 mm or full 105 mm position for the final forming stroke.
Sequential Part Staging
Positions a workpiece fixture under two different assembly tools. The 25 mm and 80 mm stops align the part for adhesive dispensing and screw driving, respectively, before returning to the 0 mm home position for unloading.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X80X25S the Right Cylinder?
Select the SCT100X80X25S when a 100 mm bore application requires four distinct end-of-travel positions from a single, compact tandem unit. The discrete stops at 0, 25, 80, and 105 mm are ideal for two-step feeding or sorting mechanisms. If the force requirement is lower, consider stepping down to an 80 mm bore model, which provides 2513 N of push per section at 0.5 MPa. For replacement, ensure the new unit matches the 100 mm bore, both the 80 mm and 25 mm section strokes, PT port threads, and the -S magnet option for sensor compatibility.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 80 + 25 mm suit your layout?
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Plumb the two sections to the correct valves for each stop.
- check Adjust end cushion screws for smooth stops.
- check Use SCT mounting accessory (FA / FB / CA / CB / LB).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X80X25S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 80 mm (first section extended), 25 mm (second section extended), and 105 mm (both sections extended). The positions are selected by pressurizing the cylinder's two sections independently or together.
No. Like all standard pneumatic cylinders, the SCT100X80X25S will not hold its position if air pressure is removed or a valve centers. The piston can drift or drop under load. If a load must be mechanically locked at a mid-stroke position, an external rod brake or pilot-operated check valve is required.
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